CN1019740B

CN1019740B - Folding desk

Info

Publication number: CN1019740B
Application number: CN86107652A
Authority: CN
Inventors: 乔治·L·麦克纳马拉; 维尔吉尔·D·彼特森
Original assignee: Sico Inc
Current assignee: Sico Inc
Priority date: 1985-11-07
Filing date: 1986-11-07
Publication date: 1992-12-30
Also published as: IN164664B; CA1274575A; DE3636979A1; MX168741B; JPS62114506A; SU1480752A3; CN86107652A; FR2589698A1; KR870004688A; GB2182846B; SE8604728L; FR2589698B1; DE3636979C2; IT8622252A0; CH672404A5; BR8605506A; DD252312A5; IT1214554B; ES2002899A6; SE8604728D0

Abstract

A table is disclosed having extension leaves secured to opposite edges of the table top by hinges. The hinges include a first hinge member which is secured to the leaf and a second hinge member which is connected to the table top and is slidable relative to the table top. The first and second hinge members are pivotally connected to one another by a pivot pin carried by the slidable second hinge member and received within an elongated slot of the first hinge member. A rigid stop is secured to the second hinge member and spaced away from the pivot pin a distance less than a radius from the first end of the slot to the terminal end and a distance less than a radial distance from the second end of the slot to the terminal end.

Description

Folding desk

The present invention relates to have the folding table of flap, particularly a kind of improved being used for is rotatably connected to a linkage on the desktop with flap.

In the prior art, the folding table with flap is well-known.Such desk generally is used in the hotel industry, and the flap of desk has two or three positions to place.Flap can horizontal positioned, and the concordant operating position that is in desktop also can turn to position up or down, makes desk be convenient to pass, and passes corridor and harvesting.When the flap of desk turns to upright position above the desktop, can play certain containment role to the plate vessel food that transports above the desktop.Except rotatable flap was arranged, the desktop of such desk all was contained on the bearing support usually, and can rotate between horizontal level and upright position.When desk time spent not, desktop can tilt to be placed on the bearing support, so that harvesting.In the prior art, an example of such desk is a United States Patent (USP) 4,446,796.This United States Patent (USP) is that the inferior people of grade of Weir (Wilson et al) obtained on May 8th, 1984.

Though the described folding table of verified above-mentioned United States Patent (USP) is very useful in hotel industry, find that also such desk exists some shortcomings in some cases.Flap as the described desk of above-mentioned United States Patent (USP) is connected with desktop by some linkages.These linkages comprise the fixed pivot axi and the sliding members that is fixed on the flap that are fixed on the desk.Sliding members can slide with respect to pivot, presses against together but these two elements are connected spring by one.When will be when a position concordant with desktop be removed the flap of desk, flap need be pulled away from open desktop one segment distance, simultaneously, it is turned to a position downward or upward, but no matter in the position that is still making progress downwards, when flap is pulled away from out desktop, all can expose linkage.Such desk is the normal tablecloth of shop white in use, and therefore, when flap was pulled away from out desktop, tablecloth may be filled in the linkage and be made dirty.In addition, when flap turned back to horizontal level, tablecloth also may be clamped.The related problem of another of prior art is, when the flap of desk when the position that makes progress turns to the position concordant with desktop, the thrust that must overcome spring just can be rotated, and therefore, flap is turned to the position concordant with desktop relatively require great effort.Usually, such operation all is in the guest room, restaurant, carries out in the presence of guests' face.At this moment, the aspect, restaurant wishes very all generally that when laying the table the dignity of trying one's best is tranquil, avoids guests are felt under the weather.Another problem of existing desk is, when flap turns to upper/lower positions, in fact is in the position away from desktop, and like this, transporting or receiving and keeping of desk just needs additional space.

The purpose of this invention is to provide a kind of folding table, it has desktop and the flap hinged with it, flap can move between a vertical position and a horizontal level by linkage, and its linkage can automatically unclamp the locking of flap when the vertical position.

For this purpose, the invention provides a kind of folding table, comprise a bearing support, a desktop is used for being connected to described desktop on the described bearing support and makes desktop be in the jockey of basic horizontal, is used for the flap of described desktop, also comprises:

Linkage, it is used for described flap is hinged to desktop, and this flap can be moved between concordant with a desktop basically primary importance and a second place that stretches upwards substantially from desktop, described linkage comprises first hinge components and one second hinge components that are fixed on the flap; The mechanism that is slidingly connected is used to make second hinge components to be connected with desktop slidably; Pin shaft device, be used for connecting rotationally first hinge components and second hinge components, described pin shaft device is fixed on by one that bearing pin on second hinge components and one are formed on first hinge components and the hole of extending between one first end and one second end constitutes, the size in described hole just in time slidably reaches holds bearing pin rotationally, and bearing pin places the second end place near the hole when flap is positioned at the described second place; Be arranged on the locking mechanism that is used for flap is locked in the described second place on the described linkage, it has a part, this part can stop the rotation of bearing pin in the hole during near second end in hole at bearing pin, and can allow described bearing pin unhinderedly to slide and this bearing pin can be rotated in described first end to first end in hole; The described mechanism that is slidingly connected comprises that one is fixed on the support on the described desktop, and described second hinge components has a part that matches with described support so that described second hinge components is contained in the described support slidably; Compressing member, it is used to compress second hinge components makes it slide into a position in described support, at first end of the described bearing pin in this position near described hole; The opposed edge of described desktop and flap is connected by described linkage, described edge has the relative surface that is convex substantially and is arranged to push against mutually, when flap when described primary importance moves to the second place, the edge surface of flap rolls on the edge of desktop, and described second hinge components slides on desktop.

Below in conjunction with accompanying drawing the present invention is described in detail, in the accompanying drawing:

Fig. 1 is the perspective view that embodies folding table of the present invention;

Fig. 2 is the front view that embodies folding table of the present invention, and in the figure, desktop is placed on stowed position;

Fig. 3 is the front view that embodies folding table of the present invention, and in the figure, desktop is in the use location,

Fig. 4 is the side view of an end of folding table, and in the figure, desktop is on the use location, and its flap is then on the position that vertical desktop makes progress;

Fig. 5 is the perspective view that linkage amplifies;

Fig. 6 is the perspective view of a channel-section steel;

Fig. 7 is the turning cylinder of a frame and the perspective view of locking mechanism;

Fig. 8 to 10 is vertical views, has represented that successively flap turns to the process of upright position below the desktop from upright position on desktop.

Figure 11 is a upward view, show under the desktop bar and with the relation of slide block and channel-section steel.

With reference to the accompanying drawings, desk 20 consists of a bearing support 22; A desktop 24, desktop 24 is rotatably mounted on the bearing support 22, will be for a more detailed description below about this point; A pair of flap 26 and 26 ' by linkage 30,30a, 30 ' and 30a ' be separately fixed at desktop opposed edges 28 and 28 ' on.

Bearing support 22 comprise the alternate longitudinal beam of pair of parallel 32 and 32 ', have

castor

34,34a, 34 ' and 34a ' on it, these castors are longitudinal beam 32 and 32 ' be supported on the common horizontal plane of horizontal plane 36 tops.Bearing support 22 also comprise a pair of

vertical column

38 and 38 '.These columns are separately fixed at longitudinal beam 32 and 32 ' go up and from longitudinal beam 32 and 32 ' extend upward.Column 38 and 38 ' interconnect by horizontal gird 40.

The lower surface 24a of desktop 24 have the alternate channel-section steel of pair of parallel 42 and 42 '.This to channel-section steel respectively near desktop edge 28 and 28 ' and parallel with it.Channel-section steel 42 and 42 ' between distance greater than column 38 and 38 ' between distance.Shown in Figure 4 and 5, channel-section steel 42 and 42 ' the same, therefore, to channel-section steel 42(shown in Fig. 4 and 6) description be applicable to fully channel-section steel 42 '.Channel-section steel 42 is an extrusion, its structure is: U type slot part 44, a vertical dividing plate 46 link to each other flute profile part 44 with the flange 48 of a level, this flange 48 can such as using several screws, be fixed on the 24a of bottom surface by any suitable mode.Channel-section steel 42 and 42 ' be fixed on the 24a of bottom surface in the mode of flute profile part 44 and 44 ' put toward each other.

See Fig. 1,2 and 5; Bar 52 be fixed to column 38 and 38 ' the top, the size of this bar 52 make its free end 54 and 54 ' can extend to column 38 and 38 ' outside, enter respectively

flute profile part

44 and 44 '.Free end 54 and 54 ' all have respectively plastic slide block 56 and 56 '.The size of these two plastic slide blocks can make they slip into respectively

flute profile part

44 and 44 '.A pair of supporting arm 58 become with 58 ' respectively an end 60 and 60 ' locate to be pivotally connected to channel-section steel 42 and 42 ' on, the other end 62 and 62 ' locate to be pivotally connected to column 38 and 38 ' on.Free end 54 and 54 ' can be in plastic slide block 56 and 56 ' interior rotation freely.Therefore, desktop 24 can be along with slide block 56 and 56 ' together with respect to bar 52 and with respect to column 38 and 38 ' rotation.

As shown in Figure 5 and Figure 6, a locking member 64 is fixed on the channel-section steel 42, and this locking member has a lock face 66.This lock face generally leans against on the outer surface of channel-section steel 42, and a sweep 66a who outwards protrudes links to each other lock face 66 with handle portion 68.This handle portion leaves outer surface one segment distance of channel-section steel.Locking member 64 is pivotally connected on the channel-section steel 42 by a bolt 67 that passes channel-section steel 42.Between channel-section steel 42 and nut 65, a spring 69 is enclosed within on the bolt 67.

Flap 26 and 26 ' link to each other with desktop by linkage 30,30a, 30 ' and 30a '.Hinge 30,30a, 30 ' and 30a ' are the same, so the description of hinge 30 is equally applicable to other hinge.Except additional letter " a " or an apostrophe ", " with expression relevant with a hinge that refers in particular to beyond, the same section of each hinge all is that identical label is arranged.Shown in Fig. 5 and 8-10, hinge 30 or, one first hinge components 80 of the hinge 30 of Fig. 8-10 ' have, this element has an installing plate 82 on the bottom surface that is fixed to flap, a ligulate element 84 vertically stretches out from installing plate 82, and its circular free end 86 extends to outside the installing plate 82 at longitudinal direction.Have a slotted hole 88 on the ligulate element 84, this slotted hole 88 is vertically arranged, and is paralleled with installing plate 82.The first end 87 of slotted hole 88 is away from installing plate 82, and the centre point of this end overlaps with the centre point of free end 86 outlines.

One second hinge components 90 will be described below with desktop 24() bottom surface 24a be connected.(detailed description to second hinge components 90 also can be referring to Fig. 8 and Figure 10, and in Fig. 8 and 10, second hinge components is denoted as 90a '.Piece mark in the narration of this section is all about hinge components 90, but it and hinge components 90a ' are identical.Therefore, the reader of this document only needs can understand referring to Fig. 8 and Figure 10 after the label back adds footnote " a " and subscript " ' " when seeing the label relevant with hinge components 90.For example, label 90 can be understood referring to the 90a ' in Fig. 8 and 10.Equally, label 92 and 102 also can be understood referring to 92a ' and 102a '.) part 90 is stocks of a square-section, the size of this bar can slip into and flute profile part 44 ' measure-alike flute profile part it.Second hinge components 90 has a bearing pin to rotate end 92, and this end has a through hole that receives bearing pin 96.This bearing pin axis generally is parallel to desktop edge 28, and perpendicular with the tongue-shaped member 84 of first hinge components 80.Bearing pin 96 passes said hole and slotted hole 88 is hinged with first hinge components 80 and second hinge components 90, and by a nuts and washers 98 fix in position.The retainer that is made of a steel shoe 100 is fixed on second hinge components 90, is in bearing pin 96 next doors and holds 92 relative sides with the pivot rotation.When second hinge components 90 as following will as described in when being fixed on the desktop, retainer forms a vertical stop surfaces 102 on second hinge components 90.This stop surfaces from the distance of bearing pin 96 only less times greater than the circular free-ended radius of first hinge components 80.Bearing pin 96 to the distance of stop surfaces 102 for example less than the second end 89(from the free end (for example) of ligulate element 84 to slotted hole 88 referring to the free end 86a ' among Figure 10, referring to the second end 89a ' of Figure 10 mesopore 88a ') distance.

The alternate channel-

section steel

104 and 104 of pair of parallel ' be basically perpendicular to desktop edge 28 and 28 ' lay, and on whole length of desktop 24 bottom surfaces, extend.Linkage and flap 26 and 26 ' align, like this, the first hinge tongue spare 80 and the 80a of hinge means 30 and 30a just can be fixed on the flap 26.Similarly, linkage 30 ' and first hinge components (for example first hinge components 80a ') of 30a ' be fixed to flap 26 ' on.These linkages are fixed on the corresponding separately flap, and therefore second hinge components 90 and second hinged member, 90 ' conllinear are opposed.Equally, the second hinge components 90a and second hinge components 90a ' conllinear are opposed.

Channel-section steel 104 and 104 ' structurally the same with channel-section steel 42, and each channel-section steel have respectively a

flute profile part

106 and 106 '.Second hinge components 90,90a, 90 ' and the size of 90a ' make its can be slidably mounted on channel-section steel 104 and 104 ' in.Therefore, second hinge components 90 and 90 ' be placed on the respectively slidably both ends of the flute profile part 106 of channel-section steel 104.Equally, the second hinge components 90a and 90a ' also by be placed on respectively slidably channel-section steel 104 ' flute profile part 106 ' both ends.Second hinge components 90,90a, 90 ' and 90a ' have pin 108,108a, 108 ' and 108a ' respectively.Spring 110 and 110 ' with pin 108 and 108 ', 108a and 108a ' couple together respectively, and second hinge components that they are connected has trend close to each other.

As shown in Figure 9, flute profile part (for example flute profile part 106 ') be configured to when folding desk board when horizontal level aligns with desktop, desktop and the opposed edge of flap are just concordant and be close together mutually.It should be noted that from figure the opposed edge of desktop and flap is a circular arc at the upper surface of desktop and flap.

Preferably see Fig. 2, a pair of flap bracing or strutting arrangement 112 and 112 ' respectively is on flap 26,26 ' be supported on and desktop 24 positions aligning.This doubling plate supporting device is the same.So, for the description of flap supporting arrangement 112 be applicable to fully flap support 112 '.

Flap bracing or strutting arrangement 112 comprises a channel-section steel element 114, this channel-section steel element extrusion the same that be a cross section with channel-section steel 42, and the installation site of channel-section steel 114 is extended its flute profile part and flap 26 and desktop 24 opposed edge-perpendicular ground.Flap bracing or strutting arrangement 112 has a support bar 118, the size of this support bar makes it can slip into channel-section steel 114, and pass through hole 120 on the channel-section steel 42, the free end of support bar 118 has a handle 122, and this handle curves inwardly with 90 ° of angles (or other suitable angle) free end from support bar.Support bar 118 can slide between the primary importance in the channel-section steel 114 and the second place.When support bar 118 during in primary importance, handle 122 be positioned at desktop 24 below, flap 26 can freely be rotated, when support bar 118 during in the second place, handle 122 be positioned at flap 26 below.When support bar 118 be drawn out one section support flap necessary apart from the time, determine its accurate positions of stretching out by a retainer 124, retainer 124 is fixed on the end face inboard of support bar 118.At above-mentioned extended position, handle 122 leans against on the pad 126, and this spacers is on the bottom surface of flap 26.Pad 126 is spaced a distance with surface and flap 26 that handle 122 leans on mutually, and this segment distance is supported on the position concordant with desktop flap.Pad 126 has an inclined-plane 128 towards channel-section steel 42.Flap 26 has handle 130, same flap 26 ' have handle 130 ' and, handle 130 and 130 ' the be separately fixed at outer peripheral central authorities of flap bottom surface.

Bracing frame 22 have a pair of shelf 140 and 140 ', shelf 140 and 140 ' in pillar 38 both sides is relative and put.Preferably referring to Fig. 1 and 7, shelf 140 and 140 ' the same, so to the description of shelf 140 be suitable for fully shelf 140 '.Shelf 140 has the alternate side frame of pair of parallel 142 and 144,

side frame

142 and 144 by

bearing pin

146 and 148 be rotatably fixed to longitudinal beam 32 and 32 ' on.As shown in the figure, bearing

146 and 148 is contained in respectively in the elongated hole 150 of

side frame

142 and 144, bearing

146 and 148 with column 38 and 38 ' between distance make when bearing pin and elongated hole 150 first end 151 ' when engaging,

side frame

142 and 144 can be around bearing

146 and 148 rotations.When bearing

146 and 148 with elongated hole 150 when 152 the second end 155 engages, therefore

side frame

142 and 144 and column 38 and 38 ' draw close can prevent that frame from rotating.

Frame

142 and 144 is connected to each other by first crossbeam 149 and one second crossbeam 158.There is a bending section 160 at the middle part of second crossbeam 158, and when shelf turned to downward position, the horizontal flanges 162 of castor top can support

side frame

142 and 144.

Below by description, advantage of the present invention will be become apparent to a most preferred embodiment operating process.

When folding table in the guest room, restaurant, when being in the position of use, with flap 26 and 26 ' expansion, and make them concordant with desktop 24, shelf 140 and 140 ' can be by turning to a position up or down like that shown in the arrow among Fig. 3, when will be when the position that makes progress turns to downward position with shelf, at first catch crossbeam 158, then it is lifted to bearing

146 and 148 positions that engage with the first end 151 and 152 of elongated hole 150 and 152, then it is turned to downward position, in this position, side frame 142 is supported on the flange 162.Should be noted that when transporting desk, shelf can remain on this downward position, because bending section 160 provides a suitable space of taking a step for the operator that the promotion desk passes the corridor.

During use, flap launches concordant with desktop, at this moment, the ligulate element 84 of first hinge components 80 generally is in the horizontal level consistent with second hinge components 90, on this position, spring 110 reinforcings are in connected hinge components 90 and bearing pin 96 below desktop 24, and desktop is relative with flap and circular edge that put is close together each other, the handle 122 of cramp bar 118 leans against on the pad 126, makes flap concordant just with desktop.

Fig. 9 has represented the linkage 30a ' when flap 26 ' when being deployed into desktop 24 flush position.

Flap position from above can turn to a position up or down.For example, will be with the downward position of flap 26 ' turn to, as shown in figure 10, the operator with a hand catch the handle 130 of flap ', with the another hand catch support bar 118 ' handle 122 ', and with below support bar 118 ' and handle 122 ' shift onto desktop 24, gravity makes then not have the flap 26 of support ' turn to the position of approximate vertical around bearing pin and 94a '.Because run-on point is below desktop, so flap edge at this moment desktop edge 28 ' below, flap when above-mentioned position, slide hinge element 90 ' and 90a ' slip into fully channel-section steel 104 and 104 ' in, therefore, retainer 100a ' fits with the end face of channel-section steel.

When flap will be rotated on the desktop and approximate vertical position (as shown in Figure 8, the subvertical position of flap 26 ' be in the figure), the operator need hold flap handle 130 ', around bearing pin 96a ' rotation flap, when flap during near horizontal level, the edge of flap lean circular edge relative on the desktop 28 with it ' on, be rotated further flap, opposed circular edge just rolls toward each other, in such a way, the edge of flap and desktop is the part of linkage.When flap 26 ' when being rotated further the approximate vertical position, flap 26 ' rotate in opposed edge, simultaneously, ligulate element 84 ' and 84a ' with slide hinge element 90 ' and 90a ' from channel-section steel 104 and 104 ' pull out.Hinge components 90 ' and the sliding motion of 90a ' by spring 110 and 110 ' adjusting, when flap is in vertical position, sliding members 90 ' and 90a ' be the position of stretching out fully at them, at this moment, ligulate element 84 ' and 84a ' on slotted hole 88 ' and 88a ' be in vertical position.Fig. 5 is illustrated in the linkage that is in complete upright position on the desktop.When bearing pin 96 and 96a cooperate with the second end 89 of slotted hole 88, tongue tray and flap vertically downward, at this moment, the edge of flap 26 is lower than relative desktop edge 28, when this position, retainer 100 and 100a and ligulate element are fitted to prevent that hinge components from further rotating.For flap 26 is rotated back into horizontal level, the operator will hold flap handle 130, just whole flap 26 lifts up to tongue tray and moves, make first end 87 of slotted hole 88 and 88a engage with bearing pin 96 and 96a, the interval between bearing pin 96 and 96a and retainer 100 and the 100a is enough to make the circular edge of tongue tray to rotate at this moment.When the operator went back to horizontal level with flap, flap and desktop opposed edges were rotated each other with leaning, and the sliding members 90 of linkage and 90a by spring 110 and 110 ' be withdrawn into channel-section steel 104 and 104 ' in.

This shows that the present invention has many advantages compared with prior art.First, flap to be turned to the position concordant with desktop from the table upright position, the operator only need overcome the weight (and spring 110 very little frictional force on the hinge of desk flap) of desktop, and do not need to overcome resemble prior-art devices required overcome by the vertical additional power that spring applied.The structure of folding table of the present invention makes can carry out the operation of flap expansion than being easier to peace quietly, therefore, uses desk honorably in the noiselessness ground development chamber.Second, because when flap upright position from desktop turns to the concordant horizontal plane of the opposed edge of a desktop and flap, the opposed edge of desktop and flap provides a rotating fulcrum for such rotation, so, linkage is in such operation, tablecloth can not made dirty, simultaneously, can not make guests see ugly linkage yet, when flap turns to upper/lower positions, compacter than the flap in the prior art, like this, also facilitate desk crowded, move on the narrow corridor, restaurant, also reduced simultaneously desk required space when the harvesting.The 3rd, because all channels can be from extracting with a kind of extrusion, so desk low cost of manufacture of the present invention.

Therefore, the present invention has the advantage that prior art never had.Though the present invention is described by a most preferred embodiment,, the present invention is not limited to this, it also comprise for those skilled in the art the embodiment that is equal to of conspicuous those improvement.Therefore, scope of the present invention is only limited by the scope of claims.

Claims

1, a kind of folding table, comprise a bearing support (22), one desktop (24), be used for being connected to described desktop on the described ground bearing support and making desktop be in the jockey of basic horizontal, desktop flap (26), linkage, it is used for described flap (26) is hinged to desktop (24), and this flap can be moved between concordant with desktop (24) basically primary importance and a second place that stretches upwards substantially from desktop (24), described linkage comprises first hinge components (80) and one second hinge components (90) that are fixed on the flap (26), it is characterized in that: mechanism is slidingly connected, comprise the channel-section steel (104) that is fixed on the described desktop and has flute profile part (106), described second hinge components (90) is placed in the described flute profile part (106) slidably; Pin uranium device, be used for connecting rotationally first hinge components (80) and second hinge components (90), described pin shaft device is fixed on bearing pin (96) on second hinge components (90) and one by one and is formed on that first hinge components (80) is gone up and the hole (88) of extending constitutes between one first end and one second end (89), the free end (86) of contiguous first hinge components of this first end (80), second end leaves above-mentioned free end (86), the size in described hole (88) just in time slidably reaches holds bearing pin (96) rotationally, and when flap (26) when being positioned at the described second place bearing pin (96) place second end (89) near hole (88) to locate; Be arranged on the locking mechanism (100) that is used for flap (26) is locked in the described second place on the described linkage, it comprises a stop surfaces part (102), this part can stop the rotation of bearing pin (96) hole (88) in during near second end (89) in hole (88) at bearing pin (96), and learns and can allow described bearing pin unhinderedly to first end slip of hole (88) and this bearing pin can be rotated in described first end;

Being used for compressing second hinge components (90) makes it inwardly slide into the spring assembly (110) of described flute profile part (106);

The opposed edge of the flap of described desktop is connected by described linkage, described edge has the relative surface that is convex substantially and is arranged to push against mutually, when flap moves to the second place from described primary importance, the edge surface of flap rolls on the edge of desktop, and described second hinge components slides in above-mentioned channel-section steel.